Networking-Blog

Tags: linux kernel

by admin

VRF SITES HTTP CONTENT FILTERED ON DANSGUARDIAN

Here is an additional firewall rule needs to be added in order for NO-NAT traffic from VRF sites
coming into the FIREWALL on the INPUT chain :

Quick Summary : This is the basic Firewall rule with Natted Traffic coming in and hitting the
PREROUTING Chain :

sudo iptables -t nat -I PREROUTING 1 -p tcp -m tcp –dport 80 -j unfiltered_web
!
sudo iptables -t nat -I unfiltered_web 2 -i eth0 -j filtered_web
!
sudo iptables -t nat -I filtered_web 1 -i eth0 -p tcp -m tcp –dport 80 -j REDIRECT –to-ports 8080

Additional rule here for sites within the VRF coming into Firewall advertising their
Local Lan address & hitting the INPUT Chain :

sudo iptables -I INPUT 1 -s 172.16.0.0/16 -p tcp -m tcp –dport 80 -j ACCEPT

January 4, 2012 1:14 pm

Tags: vrf dansguardian

by admin

LINUX – SYSLOG

To setup syslog server in UBuntu Linux, follow the steps below:-

First you need to make sure you are login as root, then stop the syslog service
```
/etc/init.d/sysklogd stop
```
Open /etc/sysconfig/syslog with your favourite editor and look for the line below:-
```
SYSLOGD="-u syslog"
```
and edit the line to:-
```
SYSLOGD="-ru syslog"
```
Now open /etc/default/syslogd file with your editor and look for
```
SYSLOGD=""
```
and change it to
```
SYSLOGD="-r"
```
** This is the steps that i miss previously and result the syslog server not listening for remote log. Other linux distro do not need to perform this step
Restart the syslog service
```
/etc/init.d/sysklogd restart
```
Now you need to configure the ubuntu firewall to allow the log sender IP.
We assume the log sender is 192.168.0.100 and our ubuntu syslog server IP
is 192.168.0.1. So, just enter the command below:-
```
iptables -I INPUT -p udp -i eth0 -s 192.168.0.100 
-d 192.168.0.1 --dport 514 -j ACCEPT
```
** Remember to change the IP above to your server IP
To check if your syslog is listening on port 514, run the command below:-
```
netstat -a | grep syslog
```
and you should see the line below, else your syslog is not listening
for remote log.
```
udp 26880 0 *:syslog *:*
```
Done. you just setup your syslog server in Unbuntu Linux. Happy logging

apt-get install syslog-ng

December 31, 2011 2:29 am

Tags: syslog

by admin

LINUX – UBUNTU

Software Centre :

i just did that,since the sofware center is acting up

sudo apt-get install gdebi

i now download the apps i need,right click on them and Open with
GDebi Package Installer

December 31, 2011 1:42 am

Tags: ubuntu

by admin

LINUX – AutoLogin

In ubuntu 10.04: sudo nano /etc/gdm/custom.conf

In Ubuntu 11.10, this has changed to ¨sudo nano /etc/lightdm/lightdm.conf” – sandy(d)

Enabling automatic Login after suspend

Type gconf-editor in a terminal (Alt+Ctrl+T to call the terminal).

Go to apps/gnome-power-manager/locks

Check “use_screensaver_settings”.

If still asked for password, you can (also in gconf-editor) go to
desktop/gnome/lockdown and check: “disable_lock_screen“

December 15, 2011 9:32 pm

Tags: autologin

by admin

LINUX – Reset NVIDIA Xorg

Regenerate the nvidia xorg configure file :

sudo nvidia-xconfig

Restart GNOME Display Manager :

/etc/init.d/gdm restart

December 11, 2011 8:43 am

Tags: nvidia

by admin

How to reset Compiz in Unity

To reset Unity to all the defaults:

unity –reset

Compiz holds its own configuration, you could try re-configuring compiz:

dpgk-reconfigure compiz

You can easily reset Unity or Compiz using the following commands
(be careful when using these commands and only use them if you really have to!):

to reset the Unity launcher icons:
```
unity --reset-icons 
```
to reset Unity:
```
unity --reset 
```

to reset Compiz:

gconftool-2 --recursive-unset /apps/compiz-1 unity --reset

If you are using Ubuntu 11.04 Natty Narwhal Alpha, you may face compiz crashes. To recover from compiz crash, you can do a

compiz --replace

If it does not work, login to the terminal (Ctrl+Alt+F1-F6) and remove the compiz settings directory from your home directory. Here is how you do that:

cd mv .compiz-1 compiz-old

Now, restart compiz:

DISPLAY=:0.0 compiz --replace

sudo apt-get install ubuntu-desktop 
Replace ubuntu-desktop with the desktop you wish to have 

ubuntu-desktop -> Ubuntu (Gnome/Unity) 
kubuntu-desktop -> Kubuntu (KDE) 
xubuntu-desktop -> Xubuntu (XFCE) 
lubuntu-desktop -> Lubuntu (LXDE)

December 11, 2011 8:41 am

Tags: unity

by admin

INSTALL XBMC ON UBUNTU 11.10

Install XBMC using medibuntu repository packages, the ubuntu restricted extras
and xbmc on Ubuntu 11.10 oneiric ocelot.

When installing XBMC it also install the and medibuntu packages and
Ubuntu restricted extras

>> Method 1 to Install XBMC:

To Install in Ubuntu 11.10/Linux Mint 12 open Terminal and copy the following
commands in the Terminal:
!
sudo apt-get install ubuntu-restricted-extras

sudo apt-get update

sudo wget –output-document=/etc/apt/sources.list.d/medibuntu.list http://www.medibuntu.org/sources.list.d/$(lsb_release -cs).list && sudo apt-get –quiet update && sudo apt-get –yes –quiet –allow-unauthenticated install medibuntu-keyring && sudo apt-get –quiet update

!
!
Now adding maverick ppa and installing XBMC enter following commands in Terminal:

!

echo deb http://ppa.launchpad.net/team-xbmc/ppa/ubuntu maverick main | sudo tee /etc/apt/sources.list.d/xbmc.list

sudo apt-key adv –keyserver hkp://keyserver.ubuntu.com –recv-keys 91E7EE5E

sudo apt-get update

sudo apt-get install xbmc

December 11, 2011 8:20 am

Tags: xbmc

by admin

SecureGate Menu

SECUREGATE MENU

Telnet :

[submenu] (Cisco Router)
[exec] (Genesis5) {xterm -fg white -bg black -fn 8×13 -T genesis5 -e /usr/bin/telnet 85.234.78.5}

Http :

[submenu] (Routers)
[exec] (idh-184) {firefox http://85.234.84.81}
[exec] (idh-185) {firefox http://85.234.85.36}

sudo vi remote_customers

[submenu] (A)
[include] (/home/monitor/acandco)
[include] (/home/monitor/adp)
[include] (/home/monitor/alpi)
[include] (/home/monitor/ahdb)
[include] (/home/monitor/amari)
[include] (/home/monitor/apetito)
[include] (/home/monitor/arun)
[end]

November 10, 2011 3:02 pm